Ep. 1: Aiko struggles to walk two years after a family-killing Burst until a transfer student arrives.

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Two years have passed since the mysterious Burst event that claimed the lives of Aiko's family members. During this time, she has made significant progress in her physical recovery, nearly regaining the ability to walk independently. However, her quiet existence is suddenly disrupted by the arrival of a new transfer student at her school. This unexpected introduction upends Aiko's daily routine and emotional stability, forcing her to confront her past trauma while navigating the complexities of a new social dynamic. The narrative focuses on the immediate impact of this stranger on Aiko's life, highlighting the tension between her hard-won stability and the uncertainty brought by this new presence.